Ground controllers lost radio contact with the flight before it reached Makassar.

Makassar is the provincial capital of South Sulawesi, Indonesia.

Route Map:

The airline issued this short statement (translated) and photos of PK-BRM and the crew members:

We (PT. Aviastar Mandiri) and the DEPHUB, BASARNAS, Police, Senkom and other concerned parties, will continue to search for our aircraft PK-BRM. We expect the cooperation of all parties and the best prayers.